Side-by-side specifications of the Synology DS212j and DS213j, from official datasheets. Differences are highlighted.
| DS212j | DS213j | |
| CPU | — | Marvell Kirkwood 1.2GHz |
| Cores / threads | — | 1 core / 1 thread |
| RAM (base) | — | 512MB DDR3 |
| RAM (max) | — | 512MB |
| Drive bays | 2 | 2 |
| Expandable to | 0 | 0 |
| M.2 slots | 0 | 0 |
| Network | 1× Gigabit | 1× Gigabit |
| 10GbE | no | no |
| Max raw capacity | 6 TB | 8TB (2×4TB) |
| Hot-swap | no | no |
| Form factor | desktop | Desktop |
| Released | 2011 | 2013 |
| Power consumption | 17.6 W / null | 19.82 W / 3.65 W |
| DSM at launch | — | — |